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Introduction
057-300 ISSUE: 1.1
Page 6 of 36
1.1 CLARIFICATION OF NOTATION
Clarification of notation used within this publication.
NOTE:
Highlights an essential element of a procedure to ensure correctness.
CAUTION!
Indicates a procedure or practice, which, if not strictly observed, could
result in damage or destruction of equipment.
WARNING!
Indicates a procedure or practice, which could result in injury to
personnel or loss of life if not followed correctly.
1.2 GLOSSARY OF TERMS
Term
Description
DSEExxx
All modules in the DSEExxx range of
Engine Only
controllers.
CAN
Controller Area Network
Vehicle standard to allow digital devices to communicate to one another.
DEF
Diesel Exhaust Fluid (AdBlue)
A liquid used as a consumable in the SCR process to lower nitric oxide and
nitrogen dioxide concentration in engine exhaust emissions.
DM1
Diagnostic Message 1
A DTC that is currently active on the engine ECU. If the ECU powers down after
a fault shutdown, DM1s are moved to the DM2 list and cleared from the DM1 list.
DM2
Diagnostic Message 2
A DTC that was previously active on the engine ECU and has been stored in the
ECU’s internal memory. This includes any faults that may have occurred during
the last run. Therefore DM2s are important to know the reason of the last
shutdown in situations where the ECU powers down when the engine is
stopped.
DM3
Diagnostic Message 3
A message sent to the engine ECU to instruct it to clear/reset the list of
previously active DTCs (DM2s).
DPF
Diesel Particulate Filter
A filter fitted to the exhaust of an engine to remove diesel particulate matter or
soot from the exhaust gas.
DPTC
Diesel Particulate Temperature Controlled Filter
A filter fitted to the exhaust of an engine to remove diesel particulate matter or
soot from the exhaust gas which is temperature controlled.
DTC
Diagnostic Trouble Code
The name for the fault code sent by an engine ECU consisting of a Suspect
Parameter Number (SPN), Failure Mode Identifier (FMI) and an Occurrence
Count (OC).
ECU/ECM
Engine Control Unit/Management
An electronic device that monitors engine parameters and regulates the fuelling.
FMI
Failure Mode Indicator
A part of DTC that indicates the type of failure, e.g. high, low, open circuit etc.
HEST
High Exhaust System Temperature
Initiates when DPF filter is full in conjunction with an extra fuel injector in the
exhaust system to burn off accumulated diesel particulate matter or soot.
OC
Occurrence Count
A part of DTC that indicates the number of times that failure has occurred.
Continued Overleaf.